Science: Rio Teodoro

In 1909, as Theodore Roosevelt was
moving out of the White House, a Brazilian army engineer named
Candido Mariano da Silva Rondon, running a telegraph line through the
untracked fastnesses of central Brazil, glimpsed the headwaters of an
unmapped river that flowed he knew not whither. He called it Rio da
Dúvida"River of Doubt."

In 1913 Theodore Roosevelt, his thirst for adventure unslaked by a
shooting trip in Africa and another unsuccessful crack at the U. S.
Presidency, was invited to address a number of learned bodies in
Argentina and Brazil....